1580661868860 has 120 divisors (see below), whose sum is σ = 5219573602320. Its totient is φ = 399325095936.

The previous prime is 1580661868853. The next prime is 1580661868913. The reversal of 1580661868860 is 688681660851.

1580661868860 is a `hidden beast` number, since 1 + 5 + 8 + 0 + 6 + 618 + 6 + 8 + 8 + 6 + 0 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 25645989 + ... + 25707548.

It is an arithmetic number, because the mean of its divisors is an integer number (43496446686).

Almost surely, 2^{1580661868860} is an apocalyptic number.

1580661868860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1580661868860 is an abundant number, since it is smaller than the sum of its proper divisors (3638911733460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1580661868860 is a wasteful number, since it uses less digits than its factorization.

1580661868860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51353577 (or 51353566 counting only the distinct ones).

The product of its (nonzero) digits is 26542080, while the sum is 63.

The spelling of 1580661868860 in words is "one trillion, five hundred eighty billion, six hundred sixty-one million, eight hundred sixty-eight thousand, eight hundred sixty".